Call-distributing system



' W. S. PACA CALL DISTRIBUTING SYSTEM Filed Sept.

AUX! LIARY BOARD.

I AUXILIARY AUXILIARY FOfilTlOH. POSITION l m...,

AUXiLIARY POSITION Mr." W W R T5 I 0 mM// W V m A N L Y H. w

MAR GmAL.

all

till predeterininedcalls are waiting" the Patented May l,

GABLSON TELEPHONE ltUllWUl YORK, A (BX11?(I lfitltllll'tlllif till! J w lly:

llpphcation filed dcpteniherd, serial No. 321,675.

To all whom it may coacemt:

Be it known. thatlt, ll namiw o illicit, a citizen of the United tlltates, residing); at Uil City, in the county oil. Venanggo and State of 5 Pennsylvania, have invented certain new and useful Improvements in tlall-llistributing ldysteins, of which the it'ollow full, clear, concise, and exact description This invention relates to telephone sys lli ln such sin boards the lamps individual to each callinu :line operate simultaneously onthc initiation of a call and it frequently happens that several operators attempt to answer the same call with the result that there is contusion 2 and loss of time.

1 r In applicants Pate :Septemher 14', 1.920, it was propo e eliminate the ditliculty above mentioned by terminating the lines in a so-called main section of the switchboard ttlltlitlSO at sections on an auxiliary board. in that ap- 1 phcatlon 1t was proposed that the initiation ofa call would. light only the signal lamp at the main board unless several calls were yawaiting the attention of that operator, in which case the linesig nais of wait ng lines would be lighted at the several sections of the auxiliary hoard. In accordance with the present invention it is proposed to arrange a telephone system havingmain and auxiliary sections so that the several sections can cooperate in rariouz-i ways depending on the condition oi tra'dlc.

According to one arrangement means are operated so that when a predetermined nuln her. of calls are waiting; at the main posi t-i ons; the line signals t at "liary poet tions will burn in a d stiuctive imtuneu torch 1 as steadily; and when a greater number olt tten- Wtion of the main opera 11 the ne W als of these lures at the auxiliary positions will i he operated in a different inanner such. as

r a by flashing;

toms, and more particularly to such systenui 1 to the other.

The present system is also arranged so that allthe line signals appearing on the main hoard may also burn on the auxiliary hoard irrespective of the number of calls to be completed, and means, such as an interjtlll'ltfll', may be operated to flash the line sip; nals of the calling lines on the auxiliary board when a predetermined number of calls are awaiting completion illhis system is further arranged so that all line signals on calling lines may be lighted on the auxiliary board, and no line signals ligrrted on the main board, in which case the auxiliary line lamps burn steadily.

it is the object of the present invention to provide simple means for changing from each oi these "various methods of operation the drawln diagrammatically represents a portion of a telephone system showing some oi the circuits associated with tWo subscrihers lines and indicating'that these lines terminate 7 main and auxiliary sections of the switchboard. l lach multiple jack has associated with it the Well known lamp signal.

In the system of the present invention seve'al inethods otcoperattion are provided for, depending; on the adjustment of the lreylil I l lfith the key K in its normal. or vertical position, when a su scriber as at L initiates a call by reinovlngr his receiver from its switchhoolr, the line relay 2 individual to his lineis actuated to operate the line signal also individual to his line in a c "cuit extending}; from ground, inner armato re and trout contact cit line relay 2, lamp 3 comluictor 4t, sprin 5 and its normal contact winding oi the marginal relay 6, WiI1 lion; oi. pilotrelay 7, to grounded battery. The pilotrelay 7 is actuated in this circuit and lights the pilot lamp to indicate that one or more calls are awaiting extension at the operators position. ll now a call is initiated on a second line easternding; to thesame main position such 12, then its line relay 8 will be operated to close a circuit for its associatel'l lamp signal 9 111 multiple With the circuit at the line signal 3. The mar gginal relay 6 is so adjusted that it will. operate only when two or more calls are ex tended to thesanie position or main, board in multiple jacks located at awaiting the attention of the operator at the main board here disclosed, the marginal relay 6 attracts its armatures to close a circuit from grounded battery, winding of the marginal relay 10, conductor 11 spring 12 and its normal contact, conductor 13, armature and trout contact of relay 6, spring 14 and its normal contact, conductor 15, through the lamps 16 associated with the multiple jacks of the calling lines at the auxiliary boards to ground at the outer front contacts and armatures of line relays 2 "and 8. The marginal relay 10 is so adjusted that it operates only when the sets of lamps individual to three different calling lines are lighted and when it attracts its armature it closes a break point in a shunt path extending to the interrupter 11 to intermittently operate the lamps 16 of calling lines at the auxiliary positions. It will thus be seen that with the key K in its normal position when one call is extended to the main board, the lamps associated with the multiple jacks of the calling line at the auxiliary positions will not be lighted. When, however two simultaneous calls are extended to the operators position at the main board, the lamps associated with the multiplejaclzs of the calling lines at the auxiliary boards will burn steadily. and when three or more calls are extended to the operators position at the main board. the lamps associated with the multiple jacks of the calling lines at the auxiliary posi- 'tionswill be caused to flash.

VVhenthe key K is adjusted to the left, the initiation of a call will cause the lighting of the lamps individual to this line on the main board and also at the auxiliary positions and when three or more calls are awaiting extension the lamps on the auxiliary board are caused to flash. This will be understood. by tracino the following circuits.

'Under the present assumption when either the line relay 2 or 8 is actuated, its associated lamp is lighted over conductor 4, normal contact and the spring 5 of the key. and windings of relays 6 and 7 to grounded battery. The lamps on the auxiliary board associated with the calling line are also operated throi'igh a circuittraceable from ground at the armature of tlie actuated line relay, through the lamps 16. conductor 15,

ed atyari'ons positions of the an:

spring 14* and its alternate contact, spring 12 ,flYlCl its contact, conductor 11, winding of relay to grounded battery. In this case as in that previously described, the relay 10 is operated when three or more simultaneous calls are awaiting extension, and

the" interrupter l/T intermittently shunts the on the main board. The interrupter .17 is also inoperative at this time so that the line lamps at the several positions of the auxiliary board will burn steadily when calls are originated irrespective ol the number oi calls awaiting extension. Let it he assumed that the line L originates a call while lcey K. is thrown to the right. The operating circuit of the lamp 3 indiridual to the line L is now open at the spring 5 and its normal contact at the key, so that this lamp will not be lighted. The lamps 16 individual to the line ll are. however. operated in a'circuit old-ed from ground. outer arl'nature and trout contact of relay 2. lamps l6, conductor 15. spring 5 and its alternate contact, and winding of marginal relay 6 and relay 7 to grounded battery. The circuit of the marginal relay 10 is open at spring 12 and its contact so that the in terrupter 1. is not eflect v at this time.

It will be understood that one or more operators positions may he provided at each of the boards designated main and auxiliary boards without departing from the spirit of the present invention.

.Vhat 1 claim is:

l. The method ol handling telephone calls n a system having primary and secondary oi ierators which consists in signaling only the primary operators when less than a predetermined numhenoi calls are awaiting attention. but in signaling said semndaryoperators when a predetermined number of calls are a raiting said primary operators, and inv 'gnaliug said secondary operators in a distinctive manner when a number of calls than the predetermined number are awaiting attention of the primary operators.

The method oi? handling telephonecalls in a system ha v ng primary and secondary operators which consists in signaling only the primarv operators when less than a predetermined nuinher ol calls are awaiting attention. but in signalingsaid secondary operators when a predetermined number of calls are awaiting said primary operators, in signaling said secoiidary (merators in a distinctive manner when :1 number of calls greater than the prcdelermined number are aitinc attention ot' the primary operators under one con ition o lratlir. and under another condition of ham: irs gmaling both ;)1"ll11!7-' and secondary operators on all calls and in operating all of s id in a d .inctive manner when a predetermined number of calls are awaiting at J.

. ion oi said operators.

The method oi handling telephone calls in a system having primary and secondary operators which consists in signaling only the primary operators when less than a prcdetermined nnmner of calls are awaiting at tention, but in signaling said secondary optors under one condition of trafiic, and um der another condition of trafiic no signals Wlll be given to the prnnary operators on any call, and the secondary operators will 7 always be signaled in the same manner irrespective of the number of calls awaiting attention. y

i at. The method of handling telephone calls in asystem having primaryand secondary operators which consists in signaling both primary and secondary operators and in signaling said operators in a distinctive mannerovhen a predetermined number of calls are awaitingattention under one condition ottraflic and under another condition of trafiic in signaling only said secondary operators. i i y 3 5. In a telephone system, aplurality of signal lamps, a current measuring device in series with certainIofsaid lamps, and a sec- 0nd current measuring device co-operating with the first to light and flash certain of said lamps. a

6. In a telephone system, primary and seconda-ry signals, circuits for each of said groups of signals, a marginal relay in series with the primary signals, a secondmarginal relay arranged to be connected in series With said secondary signals, and means jointly controlled by said relays to distinctively actuate said signals.

7. In a telephone system, primary and secondary lamps, circuits ion each of said groups of lamps, a marginal relay in series WltllllllB primary lamps, a second marginal relay arranged to be connected in series With said secondary lamps, and means jointly controlled by said relays to distinctively actuate said lamps.

8. Ina telephone system,primary and secondary lamps, circuits "for each of said lamps, a marginal relay controlled over the circuit of the primary lamps, a second marginal relay arranged to be controlled over a circuit of said secondary lamps, and a shunting circuit completed "at said marginal relaysto distinctively actuate said secondary lamps. Q i In Witness whereof, I hereunto subscribe my name this 21st day of August, A. D. 1919.

l WILLIAM s; raoa. 

